happened to me, was having it turn on in a dark room with the laptop screen lighting up the whole place. Had it facing pure dark while playing with the settings. I have non of the above app turn on, so my guess is the dark screw up the app while I playing with the settings.
I've only had the Lumia 822 about 10 days or so and it happened to me today. I was trying out Key Ring app and trying to scan barcodes on cards. Got a couple of codes read and then the app acted crazy and the camera had a green screen. Off/On reset things. It then happened every other read or so on a barcode scan with the Key Ring app. I have been able to scan QR's and barcodes using Bing previous to this a few times. Hope a permanent fix is found.
I had the same problem with my Brazilian Lumia 520. I didn't have the Amazon app installed. The problem seems to have started when I was trying to scan a bar code to install Mayhem. I removed the battery and reinserted it, and the problem seems to be fixed, at least for now. But it would be nice to have an official explanation...
My wife and I just purchased Nokia 928's 6 days ago and yesterday I noticed this green screen problem when trying to take a picture. Glad I found this site, I figured I would have to return the phone, although I'm still considering it as it's ridiculous they haven't found a solution to this. On the other hand, I absolutely love this phone and would just get another 928 which would probably have the same problem at some point in the future. Maybe Windows Phone 8.1 will fix the software issue?
*I'm assuming it's a software issue and not a hardware issue.